# Help With Simple Square Test Carve

**URL:** <https://forum.onefinitycnc.com/t/help-with-simple-square-test-carve/23915>\
**Category:** Troubleshooting (X35/X50)\
**Created:** [December 9, 2023, 10:02pm UTC](https://forum.onefinitycnc.com/t/help-with-simple-square-test-carve/23915 "2023-12-09T22:02:30Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [December 10, 2023, 7:20am UTC](https://forum.onefinitycnc.com/t/help-with-simple-square-test-carve/23915/2 "2023-12-10T07:20:41Z")

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Hey DLR,

I would say, the question is, where is your _workpiece zero_ coordinate (regarding Z), and did you probe/zero it exactly where the _workpiece zero_ coordinate is in your 3D model?

You have a G80 command. Have you checked [G80 (Canned Cycles)](https://linuxcnc.org/docs/html/gcode/g-code.html#gcode:g80-g89) → Errors?

Regarding multiple tools in one file, do you know my [Aiph5u’s ‘tool-change’ routine (V2023-03-14)](https://forum.onefinitycnc.com/t/tool-changes-and-z-height/7715/29)

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